Can you seperate Oxygen molecules from Hydrogen in water?

Splitting the hydrogen and oxygen in water is accomplished using a process called “water electrolysis" in which both the hydrogen and oxygen molecules separate into individual gasses via separate “evolution reactions." Each evolution reaction is induced by an electrode in the presence of a catalyst

Is there a diagram/picture you can provide? it seems this question goes along with a

Woah that’s a lot to read xd i’ll try though. i’ll get back t you if. i know the andwer